Crawford, B.H., Colour rendering tolerances and the colour rendering properties of light sources, Trans. Illum. Engng. Soc. (London), 28 (2), 50 (1963).
Hennicke, I., Zur Frage der Farbwiedergabe durch Lichtquellen und ihre Kennzeichnung, Farbe, 9 (1960).
Opstelten, J.J., The dependence of the general colour rendering index on the set of test colours, the standard observer and the colour difference formula, Ltg. Res. & Technol., 12, (4), 186 (1980).
Judd, D.B., Standard response functions for protanopic and deuteranopic vision, J. Research NBS, 33, 407 (1944).
Dahlquist, G. and Bjorck, A., Numerical methods (Prentice Hall Inc., Englewood Cliffs, New Jersey, 1974).
Moore, J.R., Stott, P., Davies, I.F., Halstead, M.B. and Large, F.E., The effect of measurement uncertainty on the colour rendering indices of fluorescent lamps, Ltg. Res. & Technol., 5 (1), 17 (1973).
Halstead, M.B., Morley, D.I., Palmer, D.A. and Stainsby, A.G., Colour rendering tolerances in the CIE system, Ltg. Res. & Technol., 3 (2), 99 (1971).
Henderson, S.T. and Waigh, D.T., The colour-rendering properties of fluorescent lamps and a proposed new method of specification, Trans. Ilium. Eng. Soc. (London), 18 (4) (1953).
Nimeroff, I., Metamerism and color-rendering indices, Jnl. Opt. Soc. Amer., 58, 1557 (1968).
